Recently I had my 13 year old son at the doctors for a facial rash that was preventing him from going to school.  The rash was only on the face and neck and was beetroot red.  The doctors told him that he was allergic to the sun.  This is a child that you cannot keep inside.  I have since found out about 635 and have taken him off all of the known products.  (Which is difficult considering how a 13 year old growing boy eats.)  His skin could not be better.  We now watch everything that he eats.  Thank you for all of your information.  It is great to know that we are not alone – Jacqui by email